Merge pull request #3925 from ttagu99:findcontour_example2

2015-04-21 12:21:36 +00:00 · 2015-04-21 12:21:36 +00:00 · 8e493ef370
commit 8e493ef370
parent 887fe932cc 3c797b0ca5
1 changed files with 7 additions and 2 deletions
--- a/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp
+++ b/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp
@ -27,8 +27,13 @@ void thresh_callback(int, void* );
 */
 int main( int, char** argv )
 {
-  /// Load source image and convert it to gray
-  src = imread( argv[1], 1 );
+  /// Load source image
+  src = imread(argv[1]);
+  if (src.empty())
+  {
+    cerr << "No image supplied ..." << endl;
+    return -1;
+  }

  /// Convert image to gray and blur it
  cvtColor( src, src_gray, COLOR_BGR2GRAY );